The 128 is for the RAM requirements it says it only needs 1024X.... video card with 16,24,or 32 bit.
I have 4 gig on C: drive left but the drive is in 2 partitions and I have 33 gig left on the D side which is where I am installing it.
I have a sony W510G computer
Intel Pent 4 2.4Ghz
Photo elements 3.0
It has GIGA pocket TV/Video software
Vaio media etc standard sony stuff
is this enough Info? I can give more
I use it pretty much for a TV in the Kitchen/Dinning area and picture editing LOL